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Table 6-3 Micromaster 420 Warning Codes - Siemens Micromaster 420 Operating Instruction

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Table 6-3
Warning
Description
Code
A0501
Current Limit
A0502
Overvoltage limit
A0503
UnderVoltage Limit
A0504
Inverter
Overtemperature
A0505
Inverter I
A0506
Inverter Duty Cycle
A0511
Motor Overtemperature
2
I
T
A0600
Real Time Operating
System Overrun
Warning
A0700
CB Warning 1 – see
CB manual for details
A0701
CB Warning 2 – see
CB manual for details
A0702
CB Warning 3 – see
CB manual for details
A0703
CB Warning 4 – see
CB manual for details
A0704
CB Warning 5 – see
CB manual for details
A0705
CB Warning 6 – see
CB manual for details
96
MICROMASTER 420 Warning Codes
Possible Cause
Mains supply too high,
Load regenerative
Ramp-down time too short
Mains supply too low
Short mains interruption
Warning level of inverter heat-sink
temperature is exceeded, resulting
in pulse frequency reduction and/or
output frequency reduction
(depending on parameterization)
2
T
Warning level is exceeded; current
will be reduced if parameterized.
Heatsink temperature and thermal
junction model are outside of
allowable range
Motor possibly overloaded.
Software error
Communication Board specific
Communication Board specific
Communication Board specific
Communication Board specific
Communication Board specific
Communication Board specific
6. TROUBLESHOOTING
Diagnosis & Remedy
1. Check whether the motor power
corresponds to the inverter
power.
2. Check that the cable length limits
have not been exceeded.
3. Check motor cable and motor for
short-circuits and earth faults.
4. Check whether the motor
parameters correspond with the
motor being used.
5. Check the stator resistance.
6. Increase the ramp-up-time.
7. Reduce the boost.
8. Check whether the motor is
obstructed or overloaded.
1. Check that mains supply voltage is
within allowable range
2. Increase ramp down times
Note:
Vdc-max controller is active, ramp-
down times will be automatically
increased.
Ensure that mains supply voltage
remains within allowable range
1. Check if ambient temperature is
within specified limits.
2. Check load conditions and duty
cycle.
3. Check if fan is turning when drive is
running.
Check if duty cycle is within specified
limits.
Check if duty cycle are within
specified limits.
1. Check parameter for motor thermal
time constant.
2. Check parameter for motor I
warning level.
3. Check if long periods of operation
at low speed are occuring
4. Check that boost settings are not
too high
Contact Siemens
See CB User Manual
See CB User Manual
See CB User Manual
See CB User Manual
See CB User Manual
See CB User Manual
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
2
T

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